When a certain event occur, check if CT registered to receive that
notification and send a response.
---
audio/control.c | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 85 insertions(+), 2 deletions(-)
diff --git a/audio/control.c b/audio/control.c
index d37848e..894a706 100644
--- a/audio/control.c
+++ b/audio/control.c
@@ -79,6 +79,7 @@
#define CTYPE_ACCEPTED 0x9
#define CTYPE_REJECTED 0xA
#define CTYPE_STABLE 0xC
+#define CTYPE_CHANGED 0xD
#define CTYPE_INTERIM 0xF
/* opcodes */
@@ -319,6 +320,7 @@ struct control {
uint8_t player_setting[PLAYER_SETTING_SCAN + 1];
struct media_info mi;
uint16_t registered_events;
+ uint8_t transaction_events[AVRCP_EVENT_VOLUME_CHANGED + 1];
};
static struct {
@@ -793,8 +795,74 @@ static dbus_bool_t emit_setting_changed(DBusConnection *conn,
return g_dbus_send_message(conn, signal);
}
+static int avctp_send_event(struct control *control, uint8_t id)
+{
+ uint8_t buf[AVCTP_HEADER_LENGTH + AVRCP_HEADER_LENGTH +
+ AVRCP_SPECAVCPDU_HEADER_LENGTH + 9];
+ struct avctp_header *avctp = (void *) buf;
+ struct avrcp_header *avrcp = (void *) &buf[AVCTP_HEADER_LENGTH];
+ struct avrcp_spec_avc_pdu *pdu = (void *) &buf[AVCTP_HEADER_LENGTH +
+ AVRCP_HEADER_LENGTH];
+ int sk = g_io_channel_unix_get_fd(control->io);
+ uint16_t size;
+
+ memset(buf, 0, sizeof(buf));
+
+ avctp->transaction = control->transaction_events[id];
+ avctp->packet_type = AVCTP_PACKET_SINGLE;
+ avctp->cr = AVCTP_RESPONSE;
+ avctp->pid = htons(AV_REMOTE_SVCLASS_ID);
+
+ avrcp->code = CTYPE_CHANGED;
+ avrcp->subunit_type = SUBUNIT_PANEL;
+ avrcp->opcode = OP_VENDORDEP;
+
+ pdu->company_id[0] = IEEEID_BTSIG >> 16;
+ pdu->company_id[1] = (IEEEID_BTSIG >> 8) & 0xFF;
+ pdu->company_id[2] = IEEEID_BTSIG & 0xFF;
+
+ pdu->pdu_id = AVRCP_REGISTER_NOTIFICATION;
+ pdu->params[0] = id;
+
+ switch (id) {
+ case (AVRCP_EVENT_PLAYBACK_STATUS_CHANGED):
+ size = 2;
+ pdu->params[1] = control->mi.status;
+
+ break;
+ case (AVRCP_EVENT_TRACK_CHANGED): {
+ size = 9;
+
+ /*
+ * AVRCP 1.3 supports only one track identifier: PLAYING
+ * (0x0). When 1.4 version is added, this shall be changed to
+ * contain the identifier of the track.
+ */
+ memset(&pdu->params[1], 0, 8);
+
+ break;
+ }
+ default:
+ error("Unknown event %u", id);
+ return -EINVAL;
+ }
+
+ pdu->params_len = htons(size);
+ size += AVCTP_HEADER_LENGTH + AVRCP_HEADER_LENGTH +
+ AVRCP_SPECAVCPDU_HEADER_LENGTH;
+
+ if (write(sk, buf, size) < 0)
+ return -errno;
+
+ /* Unregister event as per AVRCP 1.3 spec, section 5.4.2 */
+ control->registered_events ^= 1 << id;
+
+ return 0;
+}
+
/* handle vendordep pdu inside an avctp packet */
static int handle_vendordep_pdu(struct control *control,
+ struct avctp_header *avctp,
struct avrcp_header *avrcp,
int operand_count)
{
@@ -1158,6 +1226,8 @@ static int handle_vendordep_pdu(struct control *control,
/* Register event */
control->registered_events |= (1 << pdu->params[0]);
+ control->transaction_events[pdu->params[0]] =
+ avctp->transaction;
avrcp->code = CTYPE_INTERIM;
pdu->params_len = htons(size);
@@ -1359,7 +1429,8 @@ static gboolean control_cb(GIOChannel *chan, GIOCondition cond,
int r_size;
operand_count -= 3;
avctp->cr = AVCTP_RESPONSE;
- r_size = handle_vendordep_pdu(control, avrcp, operand_count);
+ r_size = handle_vendordep_pdu(control, avctp, avrcp,
+ operand_count);
packet_size = AVCTP_HEADER_LENGTH + r_size;
} else {
avctp->cr = AVCTP_RESPONSE;
@@ -2080,7 +2151,16 @@ static DBusMessage *control_change_playback(DBusConnection *conn,
if (status < 0)
return btd_error_invalid_args(msg);
- control->mi.status = status;
+ if ((uint8_t) status != control->mi.status) {
+ control->mi.status = status;
+
+ if (control->registered_events &
+ (1 << AVRCP_EVENT_PLAYBACK_STATUS_CHANGED)) {
+ avctp_send_event(control,
+ AVRCP_EVENT_PLAYBACK_STATUS_CHANGED);
+ }
+ }
+
control->mi.current_position = elapsed;
DBG("Change playback: %s %u", statusstr, elapsed);
@@ -2203,6 +2283,9 @@ static DBusMessage *control_change_track(DBusConnection *conn,
mi.title, mi.artist, mi.album, mi.genre,
mi.ntracks, mi.track, mi.track_length);
+ if (control->registered_events & (1 << AVRCP_EVENT_TRACK_CHANGED))
+ avctp_send_event(control, AVRCP_EVENT_TRACK_CHANGED);
+
return dbus_message_new_method_return(msg);
}
--
1.7.6
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